Contains research objectives.U.S. Navy Bureau of Ships under Contracts NObsr 72716 and NObsr 7760

Fletcher, E. W.

Loeb, A. L.

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XXX. COMPUTER COMPONENTS AND SYSTEMS*Dr. E. W. Fletcher R. Casale S. B. RussellProf. A. L. Loeb C. K. Crawford F. W. Sarles, Jr.Dr. C. C. Robinson T. More, Jr. A. J. SchneiderJ. M. Ballantyne A. H. Nelson C. E. WoodwardRESEARCH OBJECTIVESThe Computer Components and Systems Group of the Department of ElectricalEngineering, M.I.T., has previously reported its progress under separate cover.This is the first report by the group in the Quarterly Progress Report of the ResearchLaboratory of Electronics.Almost without exception, the work of this group has been focused on particular funda-mental problems stemming in each case from broad general studies of high-speed com-puter systems. The investigation of the use of ferromagnetic thin films as logical,memory, and output devices has moved decidedly into Kerr magneto-optics studies. TheKerr magneto-optic effect has been used to observe the motion of domain walls in ferro-magnetic thin films during switching. This effect is also being studied with the purposeof increasing its magnitude by means of a suitable choice of materials or by means of asuitable choice of dimensions for optimum optical interference.The original work on the wirewound cryotron was followed by attempts at componentsimplification and increased speed, and has led to a careful examination of electrongraphics. Requirements on chemical purity, geometric resolution, and reproducibilityof optical, electrical, and magnetic parameters have led to the development of molec-ular feedback control.The study of the mechanisms by which information is stored in computers has led tothe development of a concise language for the description of three-dimensional config-urations. This language is physically meaningful, capable of providing communicationbetween active workers in the field, and, most important, suitable for storage in com-puter memories. Related to this crystal algebra is the interest in the high-densityinformation content in masks used for the deposition of thin-film circuitry. To sum-marize, three main research topics have evolved in this group: magneto-optics, elec-tron graphics and molecular feedback, and the topology of structures.E. W. Fletcher, A. L. LoebThis work was supported in part by the U.S. Navy Bureau of Ships under Con-tracts NObsr 72716 and NObsr 77603.265

Computer Components and Systems

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Computer Components and Systems

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